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As an authorized distributor of XJ Electric, XUSEN ELECTRIC is excited to introduce the WGB-871A microcomputer integrated protection device(Protection relays). This cutting-edge solution redefines electrical protection in modern power systems. Designed for both versatility and reliability, it is a core component for safeguarding critical assets in distribution networks, ensuring continuous power supply, and enhancing system resilience.
Application Scope: Suitable for Various Power Infrastructures
The WGB-871A relay protection device is specifically designed for distribution and utilization scenarios at voltage levels of 10kV and below, mainly applicable for:
- Line Protection: Safeguarding lines and feeders up to 10kV.
- Station Transformer Protection: Protecting station transformers, plant transformers, and grounding transformers.
- Capacitor Protection: Safeguarding parallel capacitors in distribution settings.
- Motor Protection: Protecting medium and small asynchronous motors (up to 2000kW).
- Bus (Segmentation) Charging Protection: Ensuring the safety of bus segmentation charging processes.
Comprehensive Protection Functions
The WGB-871A is equipped with a rich set of protection functions to address various electrical faults and anomalies, enhancing the electrical protection capabilities of the system:
- Overcurrent Protection: Three-stage overcurrent protection (optional directional, undervoltage lockout, and reclosure lockout functions) and overcurrent acceleration protection.
- Inverse Time Protection: Multiple inverse time characteristics (in accordance with IEC 255-4 and BS 142 standards) suitable for overcurrent, negative sequence overcurrent, and zero-sequence overcurrent protection.
- Dedicated Motor Protection: Thermal overload protection, start timeout protection, timed and inverse time negative sequence overcurrent protection, and unbalanced current/voltage protection.
- Voltage and Frequency Protection: Under-voltage, over-voltage, loss of voltage, zero-sequence over-voltage, low-frequency load shedding, and low-voltage load shedding protection.
- Zero-Sequence Protection: Multi-stage zero-sequence overcurrent protection for lines, transformers, capacitors, motors, and charging systems.
- Non-Electrical Quantity Protection: Supports up to 4 channels of non-electrical quantity inputs (e.g., gas, temperature) with configurable tripping or alarm functions.
- Auxiliary Functions: Automatic reclosure, voltage transformer disconnection alarm, control circuit anomaly detection, and fault recording (for post-analysis).
Core Features: Outstanding Engineering Design for Modern Grids
The WGB-871A stands out with the following features, meeting the demands for efficient, flexible, and reliable operations:
- Strong Versatility: Wide range AC/DC working power supply (110V, 220V, 48V), universal strong current design input, with strong anti-interference capability.
- Integrated Design: Compact 4U chassis for easy installation in various cabinets, saving space while supporting multiple protection objects (configurable via software).
- High Precision: Independent high-precision ADC for protection, 0.5 level power measurement, ensuring accuracy in fault detection and monitoring.
- Advanced Communication: Equipped with RS485 and Ethernet interfaces, supporting IEC 103, Modbus, etc., for seamless integration into substation automation systems.
- Flexible Configuration: 8 sets of protection settings, matrix-configurable relay outputs, and 400 event records for easy customization and traceability.
- User-Friendly Operation: Graphical LCD display in English, menu-based operation, and fault recording (4 pre-fault waves, 6 post-fault waves) simplify debugging and analysis.
In an era where the stability of power systems is crucial, the WGB-871A protective relays offer unparalleled electrical protection, adaptable to diverse operational needs while complying with industry standards.
XUSEN ELECTRIC is dedicated to providing power equipment, solutions, and technical support for hydropower stations, thermal power plants, wind farms, photovoltaic power stations, and substations. Partner with us to enhance the resilience of your power system—contact us now for more details about our protective relays and electrical protection solutions.
